Transmission apparatus, transmission method, reception apparatus, and reception method

ABSTRACT

The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, and at reception method that enable a plurality of transport protocols to coexist. 
     The transmission apparatus generates transport protocol selection information used for selecting a transport protocol to be used in a specific service from a plurality of transport protocols conforming to a predetermined standard, and transmits, together with the transport protocol selection information, a content provided by the specific service according to the transport protocol set in the transport protocol selection information. The present technology is applicable to, for example, IP packet broadcasting.

TECHNICAL FIELD

The present invention relates to a transmission apparatus, atransmission method, a reception apparatus, and a reception method, moreparticularly, to a transmission apparatus, a transmission method, areception apparatus, and a reception method that enable a plurality oftransport protocols to coexist.

BACKGROUND ART

For example, in ATSC (Advanced Television Systems Committee) 3.0 as oneof next-generation terrestrial broadcasting standards, UDP/IP, that is,IP (Internet Protocol) packets each including a UDP (User DatagramProtocol) packet are determined, to be used for data transmissions. Alsoin other broadcasting systems excluding ATSC 3.0, IP packets areexpected to be used in the future (see, for example, Non-patent Document1).

-   Non-patent Document 1: “ARIB STD-B60 Version 1.1”, Association of    Radio Industries and Businesses

SUMMARY OF INVENTION Problem to be Solved by the Invention

Incidentally, in broadcasting systems such as ATSC 3.0 a plurality oftransport protocols may coexist. Therefore, a technology that enablesthe plurality of transport protocols to coexist is demanded.

The present technology has been made in view of the circumstances asdescribed above and aims at enabling a plurality of transport protocolsto coexist.

Means for Solving the Problem

According to a first embodiment of the present technology, there isprovided a transmission apparatus including: a generation unit thatgenerates transport protocol selection information used for selecting atransport protocol to be used in a specific service from a plurality oftransport protocols conforming to a predetermined standard; and atransmission unit that transmits, together with the transport protocol,selection information, a content provided by the specific serviceaccording to the transport protocol set in the transport protocolselection information.

The transmission apparatus according to the first embodiment of thepresent technology may be an independent apparatus or may be an internalblock constituting one apparatus. In addition, a transmission methodaccording to the first embodiment of the present technology is atransmission method corresponding to the transmission apparatusaccording to the first embodiment of the present technology describedabove.

In the transmission apparatus and transmission method according to thefirst embodiment of the present technology, transport protocol selectioninformation used for selecting a transport protocol to be used in aspecific service from a plurality of transport protocols conforming to apredetermined standard is generated, and a content provided by thespecific service is transmitted together with the transport protocolselection information according to the transport protocol set in thetransport protocol select ion information.

According to a second embodiment of the present technology, there isprovided a reception apparatus including: a reception unit thatreceives, together with transport protocol selection information usedfor selecting a transport protocol to be used in a specific service froma plurality of transport protocols conforming to a predeterminedstandard, a content provided by the specific service that istransmitted, according to the transport protocol set in the transportprotocol selection information; and a processing unit that carries outprocessing of reproducing the content according to the transportprotocol set in the transport protocol selection information.

The reception apparatus according to the second embodiment of thepresent technology may be an independent apparatus or may be an internalblock constituting one apparatus. In addition, a reception methodaccording to the second embodiment of the present technology is areception method corresponding to the reception apparatus according tothe second embodiment of the present technology described above.

In the reception apparatus and reception method according to the secondembodiment of the present technology, together with transport protocolselection information used for selecting a transport protocol to be usedin a specific service from a plurality of transport protocols conformingto a predetermined standard, a content provided by the specific servicethat is transmitted according to the transport protocol set in thetransport protocol selection information is received, and processing ofreproducing the content is carried out according to the transportprotocol set in the transport protocol selection information.

Effects of the Invention

According to the first and second embodiments of the present technology,a plurality of transport protocols can coexist.

It should be noted that the effects described herein are not necessarilylimited, and any effect described in the specification may be obtained.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 A diagram showing a configuration of a transmission system towhich the present technology is applied according to an embodiment.

FIG. 2 A diagram showing an example of a frame configuration of eachlayer.

FIG. 3 A diagram for explaining a transmission method of transportprotocol selection information for selecting a plurality of transportprotocols.

FIG. 4 A diagram showing a configuration of a Generic packet.

FIG. 5 A diagram showing an example of a packet type.

FIG. 6 A diagram showing an example of a syntax arranged in a case wherea packet type value is extended.

FIG. 7 A diagram showing a configuration of a Generic packet.

FIG. 8 A diagram showing an example of a packet type.

FIG. 9 A diagram showing a specific configuration of a Generic extensionheader.

FIG. 10 A diagram showing a structure arranged in an optional header.

FIG. 11 A diagram showing an example of a service type.

FIG. 12 A diagram showing a configuration of an LLS packet.

FIG. 13 A diagram showing an example of a structure arranged in an LLSheader.

FIG. 14 A diagram showing examples of a service type.

FIG. 15 A diagram showing a configuration of an LLS packet.

FIG. 16 A diagram showing an example of a FIT syntax.

FIG. 17 A diagram showing examples of the service type.

FIG. 18 A diagram showing a configuration of a BB frame.

FIG. 19 A diagram for explaining a specific configuration of anextension header in an L1 extension header transmission method.

FIG. 20 A diagram for explaining a specific configuration of theextension header in the L1 extension header transmission method.

FIG. 21 A diagram showing an example of a structure arranged in the L1extension header.

FIG. 22 A diagram showing examples of the service type.

FIG. 23 A diagram showing a configuration example of a transmissionapparatus.

FIG. 24 A diagram showing a configuration example of a receptionapparatus.

FIG. 25 A flowchart for explaining transmission processing.

FIG. 26 A flowchart for explaining reception processing.

FIG. 27 A diagram showing a configuration example of a computer.

MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present technology will be describedwith reference to the drawings. It should be noted that the descriptionswill be made in the following order.

1. System configuration

2. Frame configuration

3. Operation example

(1) Operation example 1: Generic header transmission method

(2) Operation example 2: Generic extension header transmission method

(3) Operation example 3: L2 signaling header transmission method

(4) Operation example 4: L2 signaling transmission method

(5) Operation example 5: L1 extension header transmission method

4. Configuration of each apparatus

5. Flow of processing executed in each apparatus

6. Computer configuration

1. System Configuration

FIG. 1 is a diagram showing a configuration of a transmission system towhich the present technology is applied according to an embodiment. Itshould be noted that the system refers to a logical group of a pluralityof apparatuses.

In FIG. 1, a transmission system 1 is constituted of a transmissionapparatus 10 and a reception apparatus 20. In the transmission systemdata transmissions conforming to a broadcasting system, such as ATSC 3.0are performed.

The transmission apparatus 10 transmits contents such as televisionprograms. Specifically, the transmission apparatus 10 transmits, via atransmission channel 30, a stream of target data to be transmitted, suchas video and audio (component) data of a content, as digitalbroadcasting signals.

The reception apparatus 20 receives the digital broadcasting signalstransmitted from the transmission apparatus 10 via the transmissionchannel 30 and restores and outputs the original stream. For example,the reception apparatus 20 outputs video and audio data of a contentsuch as a television program.

It should be noted that in addition to the data transmissions conformingto ATSC 3.0, the transmission system 1 of FIG. 1 is applicable to datatransmissions conforming to standards of DVB (Digital VideoBroadcasting), ISDB (Integrated Services Digital Broadcasting), and thelike, data transmissions conforming to other ATSC standards, and otherdata transmissions. Moreover, in addition to terrestrial broadcasting,satellite connections, cable television networks (wired lines), and thelike can be adopted as the transmission channel 30.

2. Frame Configuration Frame Configuration

FIG. 2 is a diagram showing an example of a frame configuration oflayers 1 (L1) to 3 (L3), that is transmitted in the transmission system1 shown in FIG. 1. It should be noted that FIG. 2 assumes a case wherean IP transmission method such as ATSC 3.0 is used as the broadcastingsystem.

As shown in FIG. 2, an IP packet (IP Packet) is transmitted in the layer3 (L3). The IP packet is constituted of an IP header (IP Header) anddata (Data). In the data of the IP packet, video and audio data,signaling information, and the like are arranged. Further, in the layer2 (L2), a Generic packet (Generic Packet) as a transmission packet istransmitted. The Generic packet is constituted of a Generic header(Generic Header) and a payload (Payload). In the payload of the Genericpacket, one or a plurality of IP packets are arranged and encapsulated(encapsulation).

A BB frame (Baseband Frame) of the layer 1 (L1) corresponding to aphysical layer is constituted of a BB frame header (Baseband FrameHeader) and a payload (Payload). In the payload of the BB frame, aplurality of Generic packets are arranged and encapsulated. Also in thelayer 1, data (Data) obtained by scrambling a plurality of BB frames ismapped onto a FEC frame (FEC Frame), and an error correction parity(parity) for the physical layer is added thereto.

Here, the physical layer frame (ATSC (Physical) Frame) of the layer 1(L1) is constituted of a preamble (Preamble) and a data part (Data).Mapped onto the data part of the physical layer frame is data obtainedby carrying out bit interleave on a plurality of FEC frames and carryingout mapping processing after that, and additionally carrying outprocessing of the physical layer, such as interleave in a time directionand a frequency direction.

3. Operation Example

Incidentally, as shown in FIG. 3, in the broadcasting system such asATSC 3.0, transport protocols of ROUTE (Real-Time Object Delivery overUnidirectional Transport), MMT (MPEG Media Transport), MPEG2-TS(Transport Stream), and the like may be operated while they coexist. InATSC 3.0, for example, ROUTE and MMT coexist.

Here, ROUTE is a protocol obtained by extending FLUTE (File Deliveryover Unidirectional Transport) which is a protocol suited forunidirectionally multicast-transferring binary files. Further, MMT is atransport system used for IP (Internet Protocol). By setting an IPaddress or URL (Uniform Resource Locator) by control information, dataof a video, audio, and the like can be referenced. MPEG2-TS is atransport system for exchanging MPEG2-format data, and data of a video,audio, and the like can be collectively handled as one stream.

These transport protocols are each constituted of a unique dataflow andservice signaling. Therefore, when providing a service, a broadcaststation side (transmission apparatus 10) selects and uses a specifictransport protocol from the plurality of transport protocols such asROUTE and MMT. In such a case, since necessary information differs foreach transport protocol, the transmission apparatus 10 needs to transmitinformation for selecting (discriminating) a specific transport protocol(hereinafter, referred to as transport protocol selection information)on the reception apparatus 20 side.

In this regard, the present technology proposes 5 transmission, methods,that is, a Generic header transmission method, a Generic extensionheader transmission method, an L2 signaling header transmission method,an L2 signaling transmission method, and an L1 extension headertransmission method, as the method of transmitting transport protocolselection information.

Hereinafter, operation examples 1 to 5 will be described as specificexamples of the 5 transmission methods.

(1) Operation Example 1

First, with reference to FIGS. 4 to 6, an operation example 1 that usesthe Generic header transmission method will be described. In the Genericheader transmission method, the transport protocol selection informationis transmitted using a header of a Generic packet (Generic header).

FIG. 4 shows a configuration of a Generic packet. In the Generic packetshown in FIG. 4, 3-bit type information (Type) is set at a head of theGeneric header. As the type information, information on a type of dataarranged in the payload of the Generic packet is set as shown in FIG. 5.

Specifically, defining a case where ROUTE is used as “system A (SystemA)”, a case where MMT is used as “system B (System B)”, and a case whereMPEG2-TS is used as “system C (System C)” as the transport protocol,when an IP packet of IPv4 of the system A is arranged in the payload,“000” is set as the type information.

Further, when an IP packet of IPv4 of the system B is arranged in thepayload, “001” is set as the type information. Furthermore, when a TSpacket of the system C is arranged in the payload, “010” is set as thetype information. It should be noted that the type information “011” isundefined (Reserved) in FIG. 5.

Similarly, when L2 signaling information of the system A is arranged inthe payload, “100” is set as the type information. Further, when L2signaling information of the system B is arranged in the payload, “101”is set as the type information. Furthermore, when L2 signalinginformation of the system C is arranged in the payload, “110” is set asthe type information.

It should be noted that when an extension by the undefined (Reserved)area is insufficient, “111” is set for extending type informationconstituted of a predetermined area. FIG. 6 shows an example of a syntaxof data arranged in a case where a packet type value is extended. Sincethe packet type value can be extended as described above, a case where 4or more transport protocols coexist can also be supported.

Referring back to FIG. 4, in the Generic header, 1-bit packet settinginformation (PC: Packet Configuration) is arranged subsequent to thetype information. When “0” is set as the packet setting information, thepacket mode becomes a single packet mode (Single packet mode) accordingto a 1-bit header mode (HM: Header Mode) arranged subsequent to thepacket setting information, and 11-bit length information (Length) andan extension header (Additional header) are arranged in the Genericheader.

It should be noted that in the single packet mode, a Generic packet inwhich an extension header is not arranged is called normal packet, and aGeneric packet in which an extension header is arranged is called longpacket.

On the other hand, when “1” is set as the packet setting information(PC), the packet mode becomes a segmentation mode (Segmentation mode) ora concatenation mode (Concatenation mode) according to a 1-bit S/C(Segmentation/Concatenation) arranged subsequent to the packet settinginformation, and 11-bit length information (Length) and an extensionheader (Additional header) are arranged in the Generic header.

In the Generic packet, a payload is arranged subsequent to the Genericheader configured as described above. In the payload, an IP packet ofIPv4, L2 signaling information, and the like of the system A arearranged, for example, according to the type information of the Genericheader.

As described above, by arranging the transport protocol selectioninformation (type information) in the Generic header and transmitting itusing the Generic header transmission method, as a transmission formatfor transmitting transport protocol selection information, the receptionapparatus 20 can select (discriminate) a transport protocol to be usedin a service to be provided from the plurality of transport protocolssuch as ROUTE and MMT.

(2) Operation Example 2

Next, with reference to FIGS. 7 to 11, an operation example 2 that usesthe Generic extension header transmission method will be described. Inthe Generic extension header transmission method, the transport protocolselection information is transmitted using an extension header of aGeneric packet (Generic extension header).

FIG. 7 shows a configuration of a Generic packet. In the Generic packetshown in FIG. 7, a configuration of a Generic header is similar to thatof the Generic header shown in FIG. 4. Therefore, descriptions thereofwill be omitted as appropriate. The transport protocol selectioninformation is arranged in the extension header (Additional header)surrounded by a bold frame in the figure. As type information (Type)arranged at a head of the Generic header in FIG. 7, information on atype of data arranged in a payload of the Generic packet is set as shownin FIG. 8.

Specifically, when an IP packet of IPv4 is arranged in the payload,“000” is set as the type information. Further, when a compressed IPpacket is arranged in the payload, “001” is set as the type information.Furthermore, when a TS packet of the MPEG2-TS method is arranged in thepayload, “010” is set as the type information.

Similarly, when L2 signaling information is arranged in the payload,“100” is set as the type information. It should be noted that in FIG. 8,pieces of type information of “Oil”, “101”, and “110” are undefined(Reserved). Moreover, when an extension by these 3 undefined (Reserved)areas is insufficient, “111” is set for extending type informationconstituted of a predetermined area.

FIG. 9 shows a specific configuration of a Generic extension header.

In FIG. 9, when “0” is set as a header mode (HM) in a single packet modein which “0” is set as the packet setting information (PC), 11-bitlength information (Length) is arranged subsequent to the header mode. Alength of the payload of the Generic packet is set as the lengthinformation. On the other hand, when “1” is set as the header mode, along-packet extension header (Additional header) is arranged subsequentto the 11-bit length information (Length).

This extension header, also including 5-bit length information, becomesa total of 16-bit length information, and a 1-bit reserved, area (Res),a 1-bit sub-stream identifier flag (SIF: Sub-stream Identifier Flag),and a 1-bit optional extension header flag (OHF: Optional HeaderExtension Flag) are also arranged, therein.

Specifically, when “0” is set as the header mode, since the lengthinformation (Length (LSB)) is 11 bits, the length of the payload of theGeneric packet takes a value within the range of 0 to 2041 (=2¹¹−1)bytes. However, the 11-bit length information cannot express the lengthof the payload of 2048 bytes or more. In this regard, when data of 2048bytes or more is to be arranged in the payload, “1” is set as the headermode so as to add 1 byte to the Generic header area. As a result, thelength of the payload of 2048 bytes or more can be expressed.

Further, when “1” is set as the sub-stream identifier flag, a 1-byte SID(Sub-stream Identifier) is arranged. Furthermore, when “1” is set as theoptional extension header flag, an optional header (Optional header) isarranged.

In the optional header, a structure shown in FIG. 10 can be arranged. Inthe structure shown in FIG. 10, various types of information arearranged for each extension header index information (Additional headerIndex). For example, when “000000” is set as the extension header indexinformation, it can be defined that service type information(service_type) is arranged in the optional header as the transportprotocol selection information.

As shown in FIG. 11, information on a transport protocol, of a serviceto be provided is set as the service type information.

Specifically, defining a case where ROUTE is used as “system A (SystemA)”, a case where MMT is used as “system B (System B)”, and a case whereMPEG2-TS is used as “system C (System C)” as the transport protocol,when data of the system A is arranged in the payload, “0x00” is set asthe service type information.

Further, when data of the system B is arranged in the payload, “0x01” isset as the service type information. Furthermore, when data of thesystem C is arranged in the payload, “0x02” is set as the service typeinformation. It should be noted that assuming a case where othertransport protocols excluding ROUTE, MMT, and MPEG2-TS are used isdefined as “system D (System D)”, when data of the system D is arrangedin the payload, “0x03” is set as the service type information. Further,the pieces of service type information “0x04” to “0xff” are undefined(Reserved) in FIG. 11.

It should be noted that unlike the type information shown in FIG. 5, theservice type information shown in FIG. 11 differentiates only the systemand not data such as an IP packet and signaling information. This isbecause the type information (FIG. 8) arranged at the head of theGeneric packet can be used to identify the data such as an IP packet andsignaling information.

Referring back to FIG. 9, also in the segmentation mode or theconcatenation mode in which “1” is set as the packet setting information(PC), when “1” is set as the optional extension header flag (OHF) as inthe single packet mode (long packet), the structure constituted of theextension header index information and the service type information(FIG. 10) is arranged in the optional header.

As described above, by arranging the transport protocol selectioninformation (service type information) in (the optional header of) theGeneric extension header and transmitting it using the Generic extensionheader transmission method, as the transmission format for transmittingtransport protocol selection information, the reception apparatus 20 canselect (discriminate) a transport protocol to be used in a service to beprovided from the plurality of transport protocols such as ROUTE andMMT.

(3) Operation Example 3

Next, with reference to FIGS. 12 to 14, an operation example 3 that usesthe L2 signaling header transmission method will be described. In the L2signaling header transmission method, the transport protocol selectioninformation is transmitted using a header of L2 signaling (L2 signalingheader).

FIG. 12 shows a configuration of an LLS (Low Layer Signaling) packet.

In FIG. 12, an IP packet and L2 signaling information are arranged inthe payload of the Generic packet, and LLS signaling information can bearranged, as the L2 signaling information. The LLS signaling informationis low-layer signaling information that does not depend on a service.

Included as the LLS signaling information are metadata such as FIT (FastInformation Table), SCD (Service Configuration Description), EAD(Emergency Alerting Description), RRD (Region Rating Description), andDCD (Default Component Description). FIT includes information indicatinga stream or service configuration in a broadcasting network, such asinformation requisite for selecting a service. SCD includes informationindicating a service configuration, and the like. EAD includesinformation on an emergency alert. RRD includes information on a rating.DCD includes minimum information for selecting a service.

When the LLS signaling information is arranged in the payload of theGeneric packet, an LLS packet constituted of an LLS header and a payloadis arranged. In the LLS packet, the LLS signaling information isarranged in the payload. Further, a structure constituted of LLS indexinformation (LLS Index) and object version information (Object Version)is arranged in the LLS header.

FIG. 13 is a diagram showing an example of the structure arranged in theLLS header shown in FIG. 12.

In FIG. 13, compression information (Compression Scheme), typeinformation (Fragment Type), and extension type information (TypeExtension) are arranged in the LLS index information. Informationindicating whether target LLS signaling information is compressed is setas the compression information. For example, “0000” means that thetarget LLS signaling information is uncompressed, and “0001” means thatthe LLS signaling information is compressed in a zip format.

Information on a type of LLS signaling information is set as the typeinformation (Fragment Type). For example, “000000”, “000001”, “000010”,and “000011” are respectively set for SCD, EAD, RRD, and DCD. It shouldbe noted that although not shown in the figure, type information canalso be set for FIT.

As the extension type information, an extension parameter is set foreach type. For example, service type information (service_type) can bearranged as the extension type information. Information on a transportprotocol of a service to foe provided is set as the service typeinformation as shown in FIG. 14.

Specifically, when the transport protocol of a service to foe providedis the system A (ROUTE), “0x00” is set as the service type information.Similarly, as the service type information, “0x01” is set in the case ofthe system B (MMT), and “0x02” is set in the case of the system C(MPEG2-TS). It should be noted that in FIG. 14, the reason why only thesystems are differentiated from one another is similar to that describedabove with reference to FIG. 11.

As described above, by arranging the transport protocol, selectioninformation (service type information) in the L2 signaling header(extension type information of LLS header) and transmitting it using theL2 signaling header transmission method, as the transmission format fortransmitting transport protocol selection information, the receptionapparatus 20 can select (discriminate) a transport protocol to be usedin a service to be provided from the plurality of transport protocolssuch as ROUTE and MMT.

(4) Operation Example 4

Next, with reference to FIGS. 15 to 17, an operation example 4 that usesthe L2 signaling transmission method will be described. In the L2signaling transmission method, the transport protocol selectioninformation is transmitted using an L2 signaling body.

FIG. 15 shows a configuration of an LLS packet.

The LLS packet is constituted of an LLS header and a payload. While LLSsignaling information is arranged in the payload of the LLS packet,service type information can be incorporated into this LLS signalinginformation body. Here, the service type information is arranged in FIT.

FIG. 16 is a diagram showing an example of a binary-type FIT syntax.

Protocol version information is set as 8-bit FIT_protocol_version. Abroadcast stream ID is set as 16-bit Broadcast_stream_id.

1-bit SCD_exist_flag is an SCD flag that indicates whether SCD istransmitted. When the SOD flag indicates that there is SOD in an areasubsequent to the 7-bit reserved area, a PLP ID of a stream in which SODis transmitted is set as 8-bit PLP_id. The PLP ID is an ID foridentifying PLP (Physical Layer Pipe).

The number of services is set as 8-bit num_services. A service loop isrepeated, according to the number of services. The following content isset as the service loop.

A service ID is set as 16-bit service_id. A provider ID is set as 16-bitprovider_id. Version information of SLS signaling information, which issignaling information in a service unit, is set as 8-bitSLS_data_version. A channel number of the service is set as 16-bitservice_channel_number. A service category is set as 5-bitservice_category.

A short service name length is set as 3-bit short_service_name_length. Ashort service name is set as 16*-bit short_service_name. Service statusinformation indicating whether a service is being provided is set as3-bit service_status. Encryption information indicating a serviceprotection is set as 1-bit sp_indicator.

A flag indicating an IP packet version is set as 1-bit IP-version_flag.A flag indicating whether there is an IP address of an IP packettransmission source (source) is set as 1-bit SLS_src_IP_addr_flag. Aflag indicating whether there is a capability code is set as 1-bitcapability_flag.

8-bit service_type is arranged subsequent to the 1-bit reserved area(reserved). Service type information is set as service_type. As shown inFIG. 17, information on a transport protocol of a service to be providedis set as the service type information.

Specifically, when the transport protocol of a service to be provided isthe system A (ROUTE), “0x00” is set as the service type information.Similarly, as the service type information, “0x01” is set in the case ofthe system B (MMT), and “0x02” is set in the case of the system C(MPEG2-TS). It should be noted that in FIG. 17, the reason why only thesystems are differentiated from one another is similar to that describedabove with reference to FIG. 11.

Referring back to FIG. 16, when capability_flag indicates that there isa capability code, an 8-bit capability code is set. Farther, whenSLS_src_IP_addr_flag indicates that there is an IP address, atransmission source (source) IP address is set as 32-bit or 128-bitSLS_dst_IP_addr.

A destination IP address is set as 32-bit or 128-bit SLS_dst_IP_addr. Aport number is set as 16-bit SLS_dst_port. TSI (Transport SessionIdentifier) is set as 16-bit SLS_TSI. A PLP ID is set as 8-bitSLS_PLP_id.

SLS bootstrap information is formed by the PLP ID, IP address, portnumber, and TSI for acquiring the SLS signaling information.

1-bit SLS_simpleservice indicates which of a basic service and a richservice the target service is.

4-bit num_service_level_descriptor is arranged subsequent to a 3-bitreserved area (reserved). The number of service level descriptors is setas num_service_level_descriptor. The service level descriptor loop isrepeated according to the number of service level descriptors. A servicelevel descriptor (service_level_descriptor) is arranged in the servicelevel descriptor loop.

A 4-bit reserved area (reserved) is arranged subsequent to the serviceloop. 4-bit num_FIT_level_descriptor is arranged subsequent to thereserved area. num_FIT_level_descriptor designates the number of FITlevel descriptors. The FIT level descriptor loop is repeated accordingto the number of FIT level descriptors. A FIT level descriptor(FIT_level_descriptor) is arranged in the FIT level descriptor loop.

As described above, by arranging the transport protocol selectioninformation (service type information) in the L2 signaling body (e.g.,FIT as LLS signaling information) and transmitting it using the L2signaling transmission method, as the transmission format fortransmitting transport protocol selection information, the receptionapparatus 20 can select (discriminate) a transport protocol to be usedin a service to be provided from the plurality of transport protocolssuch as ROOTS and MMT.

(5) Operation Example 5

Finally, with reference to FIGS. 18 to 22, an operation example 5 thatuses the L1 extension header transmission method will be described. Inthe L1 extension header transmission method, the transport protocolselection information is transmitted using an extension header (L1extension header) of a BB frame header of a BB frame (Baseband Frame) asa physical frame of the layer 1.

FIG. 18 shows a configuration of a BB frame. In FIG. 18, the BB frame isconstituted of a BB frame header and a payload (Payload). In addition toa 1- or 2-byte header (Header), an optional field (Optional Field) andan extension field (Extension Field) are arranged in the BB frameheader.

Specifically, when “0” is set as the 1-bit mode (Mode) in the header(Header), 7-bit pointer information (Pointer (LSB)) is arranged. Itshould be noted that the pointer information is information thatindicates a position of a Generic packet arranged in the payload of theBB frame. For example, when data of a Generic packet arranged, lastly ina certain BB frame is arranged over the next BB frame, positioninformation of a Generic packet arranged at the head of the next BBframe can be set as the pointer information.

Further, when “1” is set as the mode (Mode), 7-bit pointer information(Pointer (LSB)), 6-bit pointer information (Pointer (MSB)), and 2-bitoptional flag (OPTI: OPTIONAL) are arranged. The optional flag in whichthe optional field (Optional Field) and the extension field (ExtensionField) are arranged is information indicating whether the header is tobe extended.

Specifically, as shown in FIG. 19, when not extending the optional fieldand the extension field, “00” is set as the optional flag. Further, whenextending only the optional field, “01” or “10” is set as the optionalflag. It should be noted that when “01” is set as the optional flag,1-byte (8-bit) padding is performed on the optional field. Furthermore,when “10” is set as the optional flag, 2-byte (16-bit) padding isperformed on the optional field.

Further, when extending the optional field and the extension field, “11”is set as the optional flag. In this case, 3-bit extension typeinformation (TYPE (EXT_TYPE)) is set at the head of the optional field.As shown in FIG. 20, information on the extension length information(EXT_Length (LSB)) and extension field type (Extension type) that arearranged subsequent to the extension type information is set in thistype information.

Specifically, when the extension length information is arranged and onlystuffing bytes (Stuffing Bytes) are to be arranged, “00” is set as theextension type information. Further, when the extension lengthinformation is not arranged and ISSY (Input Stream Synchronizer) isarranged in the extension field, “001” is set as the extension typeinformation. Furthermore, when the extension length information isarranged and stuffing bytes are arranged in the extension field togetherwith ISSY, “010” is set as the extension type information.

Further, when the extension length information is arranged and L1signaling information is arranged in the extension field, “001” is setas the extension type information. In this case, whether to arrange thestuffing bytes is arbitrary. It should be noted that in FIG. 20, piecesof extension type information “100” to “111” are undefined (Reserved).

In addition, in the L1 extension header transmission method, thetransport protocol selection information is arranged as L1 signalinginformation of the extension field (L1 extension header). Specifically,when the L1 extension header transmission method is used, “11” is set asthe optional flag (OPTI), the optional field and the extension field areextended, “011” is set as the optional field extension type information(EXT_TYPE), and L1 signaling information including the transportprotocol selection information is arranged in the extension field.

A structure shown in FIG. 21 can be arranged in the extension field. Inthe structure shown in FIG. 21, various types of information arearranged for each extension header index information (BBF ExtensionHeader Index). When “000000” is set as the extension header indexinformation, it can be defined that service type information(service_type) is arranged in the extension field as the transportprotocol selection information.

As shown in FIG. 22, information on a transport protocol of a service tobe provided is set as the service type information.

Specifically, when the transport protocol of a service to be provided isthe system A (ROUTE), “0x00” is set as the service type information.Similarly, as the service type information, “0x01” is set in the case ofthe system B (MMT), and “0x02” is set in the case of the system C(MPEG2-TS).

As described above, by arranging the transport protocol selectioninformation (service type information) in the extension header of a BBframe header of a BB frame (extension field of L1 extension header) andtransmitting it using the L1 extension header transmission method, asthe transmission format for transmitting transport protocol selectioninformation, the reception apparatus 20 can select (discriminate) atransport protocol to be used in a service to be provided from theplurality of transport protocols such as ROUTE and MMT.

4. Configuration of Each Apparatus

Next, specific configurations of the transmission apparatus 10 and thereception apparatus 20 constituting the transmission system shown inFIG. 1 will be described.

Configuration of Transmission Apparatus

FIG. 23 is a diagram showing a configuration example of the transmissionapparatus 10.

In FIG. 23, the transmission apparatus 10 is constituted of a componentacquisition unit 111, an encoder 112, a signaling generation unit 113, asignaling processing unit 114, a transport protocol selectioninformation generation unit 115, a transport protocol selectioninformation processing unit 116, a packet generation unit 117, aphysical layer frame generation unit 118, and a transmission unit 119.

The component acquisition unit 111 acquires video and audio data ascomponents constituting a content provided by a specific service (e.g.,television program) and supplies the data to the encoder 112. Theencoder 112 encodes the video and audio data supplied from the componentacquisition unit 111 by a predetermined encoding method and supplies theencoded data to the packet generation unit 117.

It should be noted that as the content, for example, a relevant contentis acquired from a storage area for already-recorded contents based on abroadcast time slot or a live content is acquired from a studio or alocation.

The signaling generation unit 113 acquires raw data for generatingsignaling information from an external server, a built-in storage, orthe like. Using the raw data of signaling information, the signalinggeneration unit 113 generates signaling information and supplies it tothe signaling processing unit 114. Here, LLS signaling information andSLS signaling information are generated as the signaling information.

The transport protocol selection information generation unit 115acquires raw data for generating transport protocol selectioninformation from an external server, a built-in storage, or the like.Using the raw data of transport protocol selection information, thetransport protocol selection information generation unit 115 generatestransport protocol selection information and supplies it to thetransport protocol selection information processing unit 116.

The transport protocol selection information processing unit 116processes the transport protocol selection information supplied from thetransport protocol selection information generation unit 115 andsupplies it to the signaling generation unit 113, the packet generationunit 117, and the physical layer frame generation unit 118.

Specifically, when using the Generic header transmission method, theGeneric extension header transmission method, or the L2 signaling headertransmission method, the transport protocol selection information isarranged in the Generic header, the Generic extension header, or the L2signaling header (LLS header). Therefore, the transport protocolselection information is supplied to the packet generation unit 117 thatgenerates packets to which those headers are added.

Further, when using the L2 signaling transmission method, the transportprotocol selection information is arranged in the L2 signaling (LLSsignaling body). Therefore, the transport protocol selection informationis supplied to the signaling generation unit 113 that generates L2signaling (LLS signaling information). In this case, the signalinggeneration unit 113 generates L2 signaling (LLS signaling information(FIT)) using the transport protocol selection information in addition tothe raw data.

Farther, when using the L1 extension header transmission method, thetransport protocol selection information is arranged in the L1 extensionheader. Therefore, the transport protocol selection information issupplied to the physical layer frame generation unit 118 that generatesa physical layer frame.

The packet generation unit 117 generates an IP packet using thecomponent data supplied from the encoder 112 and the signalinginformation supplied from the signaling processing unit 114. The packetgeneration unit 117 also generates a Generic packet by encapsulating oneor a plurality of IP packets and supplies it to the physical layer framegeneration unit 118.

It should be noted that when using the Generic header transmissionmethod, the packet generation unit 117 arranges the transport protocolselection information supplied from the transport protocol selectioninformation processing unit 116 in the Generic header of the Genericpacket.

When using the Generic extension header transmission method, the packetgeneration unit 117 arranges the transport protocol selectioninformation in (the optional header of) the Generic extension header ofthe Generic packet. When using the L2 signaling header transmissionmethod, the packet generation unit 117 arranges the transport protocolselection information in the L2 signaling header (extension typeinformation of LLS header of LLS packet).

The physical layer frame generation unit 118 generates a physical layerframe by encapsulating the plurality of Generic packets supplied fromthe packet generation unit 117 and supplies it to the transmission unit119.

It should be noted that when using the L1 extension header transmissionmethod, the physical layer frame generation unit 118 arranges thetransport protocol selection information supplied from the transportprotocol selection information processing unit 116 in the extensionheader (extension field of L1 extension header) of the BB frame headerof the BB frame.

The transmission unit 119 carries out processing of, for example, OFDM(Orthogonal Frequency Division Multiplexing) digital modulation, on thephysical layer frame supplied from the physical layer frame generationunit 118 and transmits the processed frame as digital broadcastingsignals via an antenna 120.

It should be noted that in the transmission apparatus 10 shown in FIG.23, all the functional blocks do not need to be physically arranged in asingle apparatus, and at least a part of the functional blocks may bestructured as an apparatus physically independent from the otherfunctional blocks.

Configuration of Reception Apparatus

FIG. 24 is a diagram showing a configuration example of the receptionapparatus 20 shown in FIG. 1.

In FIG. 24, the reception apparatus 20 is constituted of a tuner 212, ademodulation unit 213, a control unit 214, a display unit 215, and aspeaker 216.

The tuner 212 syntonizes components of a predetermined frequency channelfrom digital broadcasting signals received via an antenna 211. Thedemodulation unit 213 carries out demodulation processing on the digitalbroadcasting signals syntonized by the tuner 212. In the demodulationprocessing, for example, demodulation processing on a physical layerframe received as digital broadcasting signals is carried out usingphysical layer modulation information.

The control unit 214 carries out processing on the signals supplied fromthe demodulation unit 213. For example, the control unit 214 carries outdecoding processing on a stream of the components acquired from thesignals from the demodulation unit 213 by a predetermined decodingmethod and causes the display unit 215 to display a video of a contentprovided by the selected service (e.g., television program) based on thevideo and audio data obtained resultantly, and also causes the speaker216 to output audio. It should, be noted that the control unit 214 isstructured as a system-on-chip (SoC: System On Chip), for example.

Here, in the demodulation unit 213, the transport protocol selectioninformation is acquired (extracted) from headers of a physical layerframe or a Generic packet and the like and supplied to the control unit214. The control unit 214 processes the signaling information or thestream of components according to the system (e.g., ROUTE or MMT) set inthe transport, protocol selection information from the demodulation unit213, to thus reproduce video and audio of a content.

Specifically, when using the Generic header transmission method, thecontrol unit 214 processes the signaling information or the stream ofcomponents according to the system (e.g., ROUTE or MMT) set in thetransport protocol selection information obtained from a Generic headerof a Generic packet.

Similarly, the transport protocol selection information is acquired(extracted) from (an optional header of) a Generic extension header of aGeneric packet when the Generic extension header transmission method isused, and the transport protocol selection information is acquired(extracted) from an L2 signaling header (extension type information ofLLS header of LLS packet) when the L2 signaling header transmissionmethod is used. Moreover, the transport protocol selection informationis acquired (extracted) from L2 signaling (LLS signaling information(FIT)) when the L2 signaling transmission method is used, and thetransport protocol selection information is acquired (extracted) from anextension header (extension field of L1 extension header) of a BB frameheader of a BB frame when, the L1 extension header transmission methodis used.

Then, the control unit 214 processes the signaling information or thestream of components according to the system (e.g., ROUTE or MMT) set inthe transport protocol selection information transmitted by any of thetransmission methods.

It should be noted that although the demodulation unit 213 acquires(extracts) the transport protocol selection information from headers ofa physical layer frame or a Generic packet and the like in FIG. 24, itis also possible for the control unit 214 to acquire (extract) thetransport protocol selection information, from the header of a Genericpacket, L2 signaling, and the like.

Moreover, while the display unit 215 and the speaker 216 areincorporated in the reception apparatus 20 shown in FIG. 24, the displayunit 215 and the speaker 216 may be provided outside.

5. Flow of Processing Executed in Each Apparatus

Next, with reference to the flowchart of FIGS. 25 and 26, flows ofprocessing executed in the respective apparatuses constituting thetransmission system 1 shown in FIG. 1 will be described.

Transmission Processing

First, with reference to the flowchart of FIG. 25, transmissionprocessing executed by the transmission apparatus 10 shown in FIG. 1will be described.

In Step S101, the component acquisition unit 111 acquires video andaudio data as components constituting a content. Further, in Step S101,the encoder 112 encodes the video and audio data acquired by thecomponent acquisition unit 111 by a predetermined encoding method.

In Step S102, the transport protocol selection information generationunit 115 generates transport protocol selection information using rawdata of transport protocol selection information. Also in Step S102, thetransport protocol selection information processing unit 116 processesthe transport protocol selection information generated by the transportprotocol selection information generation unit 115.

In Step S103, the signaling generation unit 113 generates signalinginformation using raw data of signaling information. Also in Step S103,the signaling processing unit 114 processes the signaling informationgenerated by the signaling generation unit 113.

It should be noted that when the L2 signaling transmission method isused, the signaling generation unit 113 generates L2 signaling (LLSsignaling information (FIT) using the transport protocol selectioninformation generated by the processing of Step S102 in addition to theraw data.

In Step S104, the packet generation unit 117 generates an IP packetusing the component data processed in Step S101 and the signalinginformation processed in Step S103. Further, the packet generation unit117 generates a Generic packet by encapsulating one or a plurality of IPpackets.

It should be noted that when the Generic header transmission method isused, the packet generation unit 117 arranges the transport protocolselection information generated by the processing of Step S102 in theGeneric header of the Generic packet. Similarly, when the Genericextension header transmission method is used, the packet generation unit117 arranges the transport protocol selection information in (theoptional header of) the Generic extension header of the Generic packet.Moreover, when the L2 signaling header transmission method is used, thepacket generation unit 117 arranges the transport protocol selectioninformation in the L2 signaling header (extension type information ofLLS header of LLS packet).

In Step S105, the physical layer frame generation unit 118 generates aphysical layer frame by encapsulating the plurality of Generic packetsgenerated by the processing of Step S104.

It should be noted that when the L1 extension header transmission methodis used, the physical layer frame generation unit 118 arranges thetransport protocol selection information generated by the processing ofStep S102 in the extension header (extension field of L1 extensionheader) of the BB frame header of the BB frame.

In Step S106, the transmission unit 119 carries out predeterminedprocessing on the physical layer frame generated by the processing ofStep S105 and transmits it as digital broadcasting signals via theantenna 120. When the processing of Step S106 is ended, the transmissionprocessing shown in FIG. 25 ends.

Heretofore, the transmission processing has been described. In thetransmission processing, transport protocol selection information usedfor selecting a transport protocol to be used in a specific service froma plurality of transport protocols defined by a broadcasting system suchas ATSC3.0 is generated, and a content provided by the specific serviceis transmitted according to the transport protocol set in the transportprotocol selection information together with the transport protocolselection information. As a result, it becomes possible to select atransport protocol for each service and enable the plurality oftransport protocols to coexist.

Reception Processing

Next, with reference to the flowchart of FIG. 26, reception processingexecuted by the reception apparatus 20 shown in FIG. 1 will bedescribed.

In Step S201, the tuner 212 syntonises components of a predeterminedfrequency channel from digital broadcasting signals received via theantenna 211. In other words, the reception apparatus 20 receives thedigital broadcasting signals from the transmission apparatus 10.

In Step S202, the demodulation unit 213 carries out demodulationprocessing on the digital broadcasting signals syntonized by the tuner212. For example, the demodulation processing is carried out on aphysical layer frame received as the digital broadcasting signals usingphysical layer modulation information. The demodulation unit 213 alsoacquires (extracts) transport protocol selection information fromheaders of a physical layer frame or a Generic packet and the like andsupplies it to the control unit 214.

Specifically, when the Generic header transmission method is used, thetransport protocol selection information is acquired (extracted) from aGeneric header of a Generic packet.

Similarly, the transport protocol selection information is acquired(extracted) from (an optional header of) a Generic extension header of aGeneric packet when the Generic extension header transmission method isused, and the transport protocol selection information is acquired(extracted) from an L2 signaling header (extension type information ofLLS header of LLS packet) when the L2 signaling header transmissionmethod is used. Moreover, the transport protocol selection informationis acquired (extracted) from L2 signaling (LLS signaling information(FIT)) when the L2 signaling transmission method is used, and thetransport protocol selection information is acquired (extracted) from anextension header (extension field of L1 extension header) of a BB frameheader of a BB frame when the L1 extension header transmission method isused.

In Step S203, the control unit 214 processes the signaling informationor the stream of components according to the system (e.g., ROUTE or MMT)set in the transport protocol selection information acquired (extracted)by the processing of Step S202. As a result, the control unit 214 cancause the display unit 215 to display a video of a content and cause thespeaker 216 to output audio of the content based on the video and audiodata.

When the processing of Step S203 is ended, the reception processingshown in FIG. 26 ends.

Heretofore, the reception processing has been described. In thereception processing, together with transport protocol selectioninformation used for selecting a transport protocol to be used in aspecific service from a plurality of transport protocols defined by abroadcasting system such as ATSC3.0, a content provided by the specificservice is received according to the transport protocol set in thetransport protocol selection information, and processing of reproducingthe content is carried out according to the transport protocol set inthe transport protocol selection information. As a result, it becomespossible to select a transport protocol for each service and enable theplurality of transport protocols to coexist.

6. Computer Configuration

The above-mentioned series of processing may be executed by hardware ormay be executed by software. If the series of processing is executed bysoftware, programs configuring that software are installed into acomputer, FIG. 27 is a diagram showing a configuration example ofhardware of a computer that executes the above-mentioned series ofprocessing according to the programs.

In a computer 900, a CPU (Central. Processing Unit) 901, a ROM (ReadOnly Memory) 902, and a RAM (Random Access Memory) 903 are connected toone another via a bus 904. An input/output interface 905 is furtherconnected to the bus 904. An input unit 906, an output unit 907, arecording unit 908, a communication unit 909, and a drive 910 areconnected to the input/output interface 905.

The input unit 906 is constituted of a keyboard, a mouse, a microphone,and the like. The output unit 907 is constituted of a display, aspeaker, and the like. The recording unit 908 is constituted of a harddisk, a nonvolatile memory, and the like. The communication unit 909 isconstituted of a network interface and the like. The drive 910 drives aremovable medium 311 such as a magnetic disk, an optical disc, amagneto-optical disk, and a semiconductor memory.

In the thus configured computer 900, the above-mentioned series ofprocessing is performed by the CPU 901 loading programs stored in theROM 902 and the recording unit 908 into the RAM 903 via the input/outputinterface 905 and the bus 904 and executing them.

The programs executed by the computer 900 (CPU 901) can be recorded andprovided on the removable medium 911 as a package medium, for example.Further, the programs can be provided via a wired or wirelesstransmission medium such as a local-area network, the Internet, anddigital satellite broadcasting.

In the computer 900, the programs can be installed, into the recordingunit 908 via the input/output interface 905 by the removable medium 911being mounted on the drive 910. Further, the programs can be received bythe communication unit 909 via the wired or wireless transmission mediumand installed into the recording unit 908. Otherwise, the programs canbe installed into the ROM 902 or the recording unit 908 in advance.

In the present specification, the processing executed by the computeraccording to the programs does not necessarily need to be performed in atime sequence in the order described as the flowchart. That is, theprocessing executed by the computer according to the programs includesprocesses executed in parallel or individually (e.g., parallelprocessing or processing by objects). Further, the programs may beprocessed by a single computer (processor) or may be processed by aplurality of computers in a distributed manner.

Note that embodiments of the present technology are not limited to theabove-mentioned embodiments and various modifications can be madewithout departing from the gist of the present technology.

Furthermore, the present technology may also take the followingconfigurations.

(1) A transmission apparatus, including:

-   -   a generation unit that generates transport protocol selection        information used for selecting a transport protocol to be used        in a specific service from a plurality of transport protocols        conforming to a predetermined standard; and    -   a transmission unit that transmits, together with the transport        protocol selection information, a content provided by the        specific service according to the transport protocol set in the        transport protocol selection information.

(2) The transmission apparatus according to (1),

-   -   in which the transport protocol selection information is in a        header of a transmission packet that transmits an IP (Internet        Protocol) packet.

(3) The transmission apparatus according to (1),

-   -   in which the transport protocol selection information is        arranged in an extension header of a transmission packet that        transmits an IP packet.

(4) The transmission apparatus according to (1),

-   -   in which the transport protocol selection information is        arranged in a header added to L2 signaling information arranged        in a payload of a transmission packet that transmits an IP        packet.

(5) The transmission apparatus according to (1),

-   -   in which the transport protocol selection information is        included in L2 signaling information arranged in a payload of a        transmission packet that transmits an IP packet.

(6) The transmission apparatus according to (1),

-   -   in which the transport protocol selection information is        arranged in an extension header of a BB (Baseband) frame.

(7) The transmission apparatus according to any one of (1) to (6), inwhich

-   -   the predetermined standard is ATSC (Advanced Television Systems        Committee) 3.0, and    -   the plurality of transport protocols are ROUTE (Real-Time Object        Delivery over Unidirectional Transport) and MMT (MPEG Media        Transport).

(8) A transmission method for a transmission apparatus, including thesteps of:

-   -   by the transmission apparatus,    -   generating transport protocol selection information used for        selecting a transport protocol to be used in a specific service        from a plurality of transport protocols conforming to a        predetermined standard; and    -   transmitting, together with the transport protocol selection        information, a content provided by the specific service        according to the transport protocol set in the transport        protocol selection information.

(9) A reception apparatus, including:

-   -   a reception unit than receives, together with transport protocol        selection information used for selecting a transport protocol to        be used in a specific service from a plurality of transport        protocols conforming to a predetermined standard, a content        provided by the specific service that is transmitted according        to the transport protocol set in the transport protocol        selection information; and    -   a processing unit that carries out processing of reproducing the        content according to the transport protocol set in the transport        protocol selection information.

(10) The reception apparatus according to (9),

-   -   in which the transport protocol selection information is        arranged in a header of a transmission packet that transmits an        IP packet.

(11) The reception apparatus according to (9),

-   -   in which the transport protocol selection information is        arranged in an extension header of a transmission packet that        transmits an IP packet.

(12) The reception apparatus according to (9),

-   -   in which the transport protocol selection information is        arranged in a header added to L2 signaling information arranged        in a payload of a transmission packet that transmits an IP        packet.

(13) The reception apparatus according to (9),

-   -   in which the transport protocol selection information is        included in L2 signaling information arranged in a payload of a        transmission packet that transmits an IP packet.

(14) The reception apparatus according to (9),

-   -   in which the transport protocol selection information is        arranged in an extension header of a BB frame.

(15) The reception apparatus according to (9), in which

-   -   the predetermined standard is ATSC 3.0, and    -   the plurality of transport protocols are ROUTE and MMT.

(16) A reception method for a reception apparatus, including the stepsof:

-   -   by the reception apparatus,    -   receiving, together with transport protocol selection        information used for selecting a transport protocol to be used        in a specific service from a plurality of transport protocols        conforming to a predetermined standard, a content provided by        the specific service that is transmitted according to the        transport protocol, set in the transport protocol selection        information; and    -   carrying out processing of reproducing the content according to        the transport protocol set in the transport protocol selection        information.

DESCRIPTION OF REFERENCE NUMERALS

-   1 transmission system-   10 transmission apparatus-   20 reception apparatus-   30 transmission channel-   111 component acquisition unit-   113 signaling generation unit-   115 transport protocol selection information generation unit-   117 packet generation unit-   118 physical layer frame generation unit-   119 transmission unit-   212 tuner-   213 demodulation unit-   214 control unit-   215 display unit-   216 speaker-   900 computer-   901 CPU

The invention claimed is:
 1. A transmission apparatus, comprising:circuitry configured to generate transport protocol selectioninformation used for selecting a transport protocol to be used in aspecific service from a plurality of transport protocols conforming to apredetermined standard; and transmit, together with the transportprotocol selection information, a content provided by the specificservice according to the transport protocol set in the transportprotocol selection information, wherein the plurality of transportprotocols include at least ROUTE (Real-Time Object Delivery overUnidirectional Transport) and MMT (MPEG Media Transport), and thetransport protocol selection information is included in a table as LLS(Low Layer Signaling) information.
 2. The transmission apparatusaccording to claim 1, wherein the predetermined standard is ATSC(Advanced Television Systems Committee) 3.0.
 3. A transmission methodfor a transmission apparatus, comprising: generating, using circuitry,transport protocol selection information used for selecting a transportprotocol to be used in a specific service from a plurality of transportprotocols conforming to a predetermined standard; and transmitting,together with the transport protocol selection information, a contentprovided by the specific service according to the transport protocol setin the transport protocol selection information, wherein the pluralityof transport protocols include at least ROUTE (Real-Time Object Deliveryover Unidirectional Transport) and MMT (MPEG Media Transport), and thetransport protocol selection information is included in a table as LLS(Low Layer Signaling) information.
 4. A reception apparatus, comprising:circuitry configured to receive, together with transport protocolselection information used for selecting a transport protocol to be usedin a specific service from a plurality of transport protocols conformingto a predetermined standard, a content provided by the specific servicethat is transmitted according to the transport protocol set in thetransport protocol selection information; and carry out processing ofreproducing the content according to the transport protocol set in thetransport protocol selection information, wherein the plurality oftransport protocols include at least ROUTE (Real-Time Object Deliveryover Unidirectional Transport) and MMT (MPEG Media Transport), and thetransport protocol selection information is included in a table as LLS(Low Layer Signaling) information.
 5. The reception apparatus accordingto claim 4, wherein the predetermined standard is ATSC 3.0, and theplurality of transport protocols are ROUTE and MMT.
 6. A receptionmethod for a reception apparatus, comprising: receiving, together withtransport protocol selection information used for selecting a transportprotocol to be used in a specific service from a plurality of transportprotocols conforming to a predetermined standard, a content provided bythe specific service that is transmitted according to the transportprotocol set in the transport protocol selection information; andcarrying out, using circuitry, processing of reproducing the contentaccording to the transport protocol set in the transport protocolselection information, wherein the plurality of transport protocolsinclude at least ROUTE (Real-Time Object Delivery over UnidirectionalTransport) and MMT (MPEG Media Transport), and the transport protocolselection information is included in a table as LLS (Low LayerSignaling) information.